EasyXLS

How to add formulas in cells in C++

EasyXLS Excel library can be used to export Excel files in C++. The integration varies depending on the project technique, if .NET Framework can be used or not.

EasyXLS using COM+ for projects without .NET Framework

If you opt for the COM+ version of EasyXLS, be sure that you have EasyXLS installed and registered on your machine.

Step 1: Download and install EasyXLS Excel Library for .NET/COM+

To download the trial version of EasyXLS Excel Library, press the below button:

Download EasyXLS™ Excel Library for C++

If you already own a license key, you may login and download EasyXLS from your account.

Step 2: Verify if EasyXLS is registered

Check if EasyXLS component is present in Component Services.

Step 3: Run C++ code that adds formula to Excel cell

Execute the following C++ code that exports an Excel file with formulas.

/* -----------------------------------------------------------
 * Tutorial 11
 * 
 * This tutorial shows how to create an Excel file in C++ that
 * has a cell that contains SUM formula for a range of cells.
 * -------------------------------------------------------- */

#include "stdafx.h"
#include "EasyXLS.h"
#include <conio.h>

int _tmain(int argc, _TCHAR* argv[])
{
    printf("Tutorial 11\n----------\n");

    HRESULT hr;

    // Initialize COM
    hr = CoInitialize(0);

    // Use the SUCCEEDED macro and get a pointer to the interface
    if (SUCCEEDED(hr))
    {
        // Create a pointer to the interface that exports Excel files
        EasyXLS::IExcelDocumentPtr workbook;
        hr = CoCreateInstance(__uuidof(EasyXLS::ExcelDocument),
                              NULL,
                              CLSCTX_ALL,
                              __uuidof(EasyXLS::IExcelDocument),
                              (void**) &workbook) ;

        if (SUCCEEDED(hr)){

            // Create a sheet
            workbook->easy_addWorksheet_2("Formula");
            
            // Get the table of data for the sheet, add data in sheet and the formula
            EasyXLS::IExcelWorksheetPtr xlsFirstTab = 
                (EasyXLS::IExcelWorksheetPtr)workbook->easy_getSheet("Formula");
            EasyXLS::IExcelTablePtr xlsTable = xlsFirstTab->easy_getExcelTable();
            xlsTable->easy_getCell_2("A1")->setValue("1");
            xlsTable->easy_getCell_2("A2")->setValue("2");
            xlsTable->easy_getCell_2("A3")->setValue("3");
            xlsTable->easy_getCell_2("A4")->setValue("4");
            xlsTable->easy_getCell_2("A6")->setValue("=SUM(A1:A4)");

            // Export Excel file
            printf("Writing file C:\\Samples\\Tutorial11 - formulas in Excel.xlsx.");
            workbook->easy_WriteXLSXFile("C:\\Samples\\Tutorial11 - formulas in Excel.xlsx");

            // Confirm export of Excel file
            _bstr_t sError = workbook->easy_getError();
            if (strcmp(sError, "") == 0){
                printf("\nFile successfully created. Press Enter to Exit...");
            }
            else{
                printf("\nError encountered: %s", (LPCSTR)sError);
            }

            // Dispose memory
            workbook->Dispose();
        }
        else{
            printf("Object is not available!");
        }
    }
    else{
        printf("COM can't be initialized!");
    }

    // Uninitialize COM
    CoUninitialize();

    _getch();
    return 0;
}

C++ and .NET Framework
This tutorial is valid for C++ applications that cannot use .NET Framework. It is recommended, for better performances, that if the C++ application already uses or can use .NET Framework to make use of this similar code sample.

Overloaded methods
For methods with same name but different parameters, only the first method overload retains the original name. Subsequent overloads are uniquely renamed by appending to the method name '_2', '_3', etc (method, method_2, method_3), an integer that corresponds to the order of declaration that can be found in EasyXLS.h, a file that comes with EasyXLS installation.

EasyXLS in C++.NET projects using .NET Framework

If you opt for the .NET Framework version of EasyXLS, you need a C++.NET project and to include EasyXLS.dll into project.

Step 1: Download and install EasyXLS Excel Library for .NET

To download the trial version of EasyXLS Excel Library, press the below button:

Download EasyXLS™ Excel Library for C++.NET

If you already own a license key, you may login and download EasyXLS from your account.

Step 2: Include EasyXLS library into project

EasyXLS.dll must be added to your project. EasyXLS.dll can be found after installing EasyXLS, in "Dot NET version" folder.

Step 3: Run C++ code that adds formula to Excel cell

Execute the following C++ code that exports an Excel file with formulas.

/*----------------------------------------------------------------
 | Tutorial 11
 |
 | This tutorial shows how to create an Excel file in C++.NET that
 | has a cell that contains SUM formula for a range of cells.
 ---------------------------------------------------------------*/

#include "stdafx.h"

#using <mscorlib.dll>

using namespace System;
using namespace EasyXLS;

int main()
{
    Console::WriteLine("Tutorial 11\n----------\n");

    // Create an instance of the class that exports Excel files
    ExcelDocument ^workbook = gcnew ExcelDocument();

    // Create a sheet
    workbook->easy_addWorksheet("Formula");

    // Get the table of data for the sheet, add data in sheet and the formula
    ExcelWorksheet ^xlsFirstTab = safe_cast<ExcelWorksheet^>(workbook->easy_getSheet("Formula"));
    ExcelTable ^xlsTable = xlsFirstTab->easy_getExcelTable();
    xlsTable->easy_getCell("A1")->setValue("1");
    xlsTable->easy_getCell("A2")->setValue("2");
    xlsTable->easy_getCell("A3")->setValue("3");
    xlsTable->easy_getCell("A4")->setValue("4");
    xlsTable->easy_getCell("A6")->setValue("=SUM(A1:A4)");

    // Export Excel file
    Console::WriteLine("Writing file C:\\Samples\\Tutorial11 - formulas in Excel.xlsx.");
    workbook->easy_WriteXLSXFile("C:\\Samples\\Tutorial11 - formulas in Excel.xlsx");

    // Confirm export of Excel file
    String ^sError = workbook->easy_getError();
    if (sError->Equals(""))
        Console::Write("\nFile successfully created. Press Enter to Exit...");
    else
        Console::Write(String::Concat("\nError encountered: ", sError, "\nPress Enter to Exit..."));

    // Dispose memory
    delete workbook;

    Console::ReadLine();

    return 0;
}

EasyXLS Excel libraries:

.NET
Excel Library for C++
full COM+ version to import, export or convert Excel files
Excel Writer for C++
COM+ version to create and export Excel files
Download EasyXLS™ Excel Library for C++

File formats:

MS Excel 97 - 2003
MS Excel 2007 - 2010
MS Excel 2013
MS Excel 2016
MS Excel 2019
XLSXXLSMXLSBXLS
XMLHTMLCSVTXT